I have ceiling stress cracks in my dining/living room ceiling, and it's coming time I tried to fix them. I went into the attic and noticed the ridge from the garage that runs into the attic has no post, and there are 3-4 interior gable studs missing on one side too. Can this be causing the cracks to keep coming back? Before I rip down the sheet rock from the ceiling and replace it, (I've tried to fill the cracks 3 times already and they come back quick and I think from opening them each time with the knife has compromised the integrity already) should I post and put in those gable studs? Or will it cause extra pressure pushing down on the ceiling? HELP!!